To help with this, the Sensics team decided to create a simple iPhone app (Android version coming soon) that helps with these calculations. This app is now available as a free download from iTunes. Think about it as public service for the VR community.
In it's current beta form, the app provides several useful conversions:
- TV screen size to/from goggle field of view
- Screen size and aspect ratio to/from field of view
- Quaternion to/from Euler angles